字符串.FieldsFunc() Golang 中的函数用于在每次运行满足 f(c) 的 Unicode 代码点 c 时拆分给定的字符串str 并返回 str 切片的数组。
Syntax:
Here, str is the given string, the rune is a built-in type meant to contain a single Unicode character and f is a user-defined function.
Return: If all code points in str satisfy f(c) or the string is empty, an empty slice is returned.
注意：此函数不保证它调用 f(c) 的顺序。如果 f 没有为给定的 c 返回一致的结果，则 FieldsFunc 可能会崩溃。
示例 1：
func FieldsFunc(str string, f func(rune) bool) []string输出：
// Golang program to illustrate the
// strings.FieldsFunc() Function
package main
import (
"fmt"
"strings"
"unicode"
)
func main() {
// f is a function which returns true if the
// c is number and false otherwise
f := func(c rune) bool {
return unicode.IsNumber(c)
}
// FieldsFunc() function splits the string passed
// on the return values of the function f
// String will therefore be split when a number
// is encontered and returns all non-numbers
fmt.Printf("Fields are: %q\n",
strings.FieldsFunc("ABC123PQR456XYZ789", f))
}
示例 2：
Fields are: ["ABC" "PQR" "XYZ"]输出：
// Golang program to illustrate the
// strings.FieldsFunc() Function
package main
import (
"fmt"
"strings"
"unicode"
)
func main() {
// f is a function which returns true if the
// c is a white space or a full stop
// and returns false otherwise
f := func(c rune) bool {
return unicode.IsSpace(c) || c == '.'
}
// We can also pass a string indirectly
// The string will split when a space or a
// full stop is encontered and returns all non-numbers
s := "We are humans. We are social animals."
fmt.Printf("Fields are: %q\n", strings.FieldsFunc(s, f))
}